coyim: Fixed missing version number in the "About" dialog.

1. Added steps to generate the version number file, so that the
   about dialog now displays the version number correctly.

2. Bump PKGREVISION

chat/coyim/Makefile

@@ -1,8 +1,8 @@
-# $NetBSD: Makefile,v 1.2 2019/05/27 15:18:17 bsiegert Exp $
+# $NetBSD: Makefile,v 1.3 2019/06/02 13:41:31 fox Exp $
 
 DISTNAME=	coyim-0.3.11
 MASTER_SITES=	${MASTER_SITE_GITHUB:=coyim/}
-PKGREVISION=	1
+PKGREVISION=	2
 CATEGORIES=	chat
 GITHUB_TAG=	v${PKGVERSION_NOREV}
 EXTRACT_USING=	bsdtar
@@ -28,9 +28,12 @@ CHECK_PORTABILITY_SKIP+=	build/mac-bundle/coyim-launcher.sh
 COYIM_ICON=		coyim.png
 COYIM_ICON_SRC=		${WRKSRC}/build/mac-bundle/coy.iconset/icon_32x32@2x.png
 COYIM_DESKTOP=		${WRKSRC}/build/coyim.desktop
+COYIM_VERSION_FILE=	${WRKSRC}/gen_version_file.sh
 
 INSTALLATION_DIRS+=	share/applications share/pixmaps
 
+REPLACE_SH+=		gen_version_file.sh
+
 SUBST_CLASSES+=			desktop-entry
 SUBST_STAGE.desktop-entry=	post-build
 SUBST_MESSAGE.desktop-entry=	Create desktop entry.
@@ -42,6 +45,9 @@ SUBST_SED.desktop-entry+=	-e '/^$$/d'
 
 CHECK_RELRO_SKIP=	bin/coyim
 
+pre-build:
+	${RUN} cd ${WRKSRC} && ${COYIM_VERSION_FILE} ${GITHUB_TAG}
+
 do-install:
 	${INSTALL_PROGRAM} ${WRKDIR}/bin/coyim ${DESTDIR}${PREFIX}/bin
 	${INSTALL_DATA} ${COYIM_DESKTOP} ${DESTDIR}${PREFIX}/share/applications/